The heat-transfer rate to the surroundings from a person at rest is about 100 W. Suppose the ventilation system fails in an auditorium containing 2000 people. Assume there is no heat transfer hrough the auditorium walls. A. Determine the increase in internal energy of the air in the auditorium during the first 20 min after the ventilation system fails. Express your result in MJ. B. Considering the auditorium and all of the people as a system, determine the increase in intenal

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter40: Typical Operating Conditions
Section: Chapter Questions
Problem 10RQ: The seasonal energy efficiency ratio (SEER) includes the energy used in the _____and _____cycles.
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The heat-transfer rate to the surroundings from a
person at rest is about 100 W. Suppose the
ventilation system fails in an auditorium containing
2000 people. Assume there is no heat transfer
through the auditorium walls.
A. Determine the increase in internal energy of the
air in the auditorium during the first 20 min
after the ventilation system fails. Express your
result in MJ.
B. Considering the auditorium and all of the people
as a system, determine the increase in internal
energy (MJ) of the system. How do you explain
the fact that the temperature of the air increases?
Transcribed Image Text:The heat-transfer rate to the surroundings from a person at rest is about 100 W. Suppose the ventilation system fails in an auditorium containing 2000 people. Assume there is no heat transfer through the auditorium walls. A. Determine the increase in internal energy of the air in the auditorium during the first 20 min after the ventilation system fails. Express your result in MJ. B. Considering the auditorium and all of the people as a system, determine the increase in internal energy (MJ) of the system. How do you explain the fact that the temperature of the air increases?
Expert Solution
Step 1: Introduction

Internal energy is the amount of energy possessed by the molecule of the body . here the air is being considered whose energy is being increased . the heat coming out of the every person will leads to the increase in the temperature of the air because the heat is not allowed to pass trough the walls and ventilation system is not working

Here the temperature of the air will increase due the the fact that the all of heat is going to the environment only

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